Ryan Sun, MD
NPI 1891430807 · Urology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan Sun, MD is a Urology Physician provider in Stanford, CA (NPI 1891430807).
Provider details
- NPI number
- 1891430807
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A177263 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
4 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
857 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 165 | $154 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 115 | $199 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 99 | $109 |
| Ultrasound Measurement of Bladder Capacity After Voiding51798 | 86 | $16 |
| Diagnostic Exam of Bladder and Urethra Using an Endoscope52000 | 67 | $310 |
| Electronic Assessment of Bladder Emptying51741 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 105 | 48 |
| Mirabegronbrand: Myrbetriq | 80 | 32 |
| Finasteride | 61 | 28 |
| Solifenacin Succinate | 27 | 12 |
| Trospium Chloride | 26 | 14 |
| Alfuzosin Hclbrand: Alfuzosin Hcl Er | 25 | 13 |
| Cephalexin | 21 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$121 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-05-03
- Last updated
- 2024-03-14
- Certified
- 2024-03-14
Frequently asked questions
- What is Ryan Sun's NPI number?
- Ryan Sun's National Provider Identifier (NPI) is 1891430807, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Sun's specialty?
- Ryan Sun is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Ryan Sun located?
- Ryan Sun's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Ryan Sun's phone number?
- The practice phone number listed in the NPPES registry for Ryan Sun is (650) 723-4000.
- Does Ryan Sun accept Medicare?
- Ryan Sun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan Sun's NPI active?
- Yes — Ryan Sun's NPI (1891430807) is active in the NPPES registry as of the last update on 2024-03-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.